No, Any brown egg layers can’t be carriers of the blue egg gene, since it’s a dominant gene. That also means that the mom only carries one blue egg gene.
Satins need to have 90% Silkie traits, I believe. I heard @LadiesAndJane mention that before.
So no, they would not be Satins. Similar, sure, but definitely not the same. And yes, they do need to be specifically bred for. They are not “flimsy” like EEs. Heck, anyone could breed EEs if they wanted.
1.) Mixed colors. It will be neither black nor buff. I can’t pinpoint exact plumage colors that will pop up, though. I’m gonna assume they would be known as “mixed colors”
2.) Hard, all the F1 crosses will be hard-feathered
1.) You will get no blue egg layers. If the EE has 2 blue egg genes, 100% of the offspring will lay green. If he has one, you will get 50% that lay green and 50% that lay brown/carry brown. It’s the same if the mom is the EE, except you would already know the female offspring will lay green.
2.)...